<p>
<span id='0'>Đầu</span>
<span id='1'>tiên</span>
<span id='2'>xin</span>
<span id='3'>khẳng</span>
<span id='4'>định</span>
<span id='5'>cái</span>
<span id='6'>chuyện</span>
</p>
我想选择 id 为 2 到 5 的跨度。我想将它们 wrapAll()<span class="wrap">
$("seletedspans").wrapAll("<span class="wrap"></span")
怎么做?